Page Comparison

1. Press the Exlpore Pins Button 

We will see the pins partBuilder extracted from the IBIS FILE

2. The Pin Explorer pops up

we can see an ALL_POWER_PINS Pin group and we press the '+' to collapse it

3. Next we collapse the ALL_SIGNAL_PINS PIN_GROUP

Improvements are on the way to make the expand/collapse experience better.

4. Both PIN_GROUPS are collapsed 

we see it reports

 46 pins in the ALL_POWER_PINS group

and 

50 pins in the ALL_SIGNAL_PINS group

5. Now we enter a PIN_NAME match filter

we enter 

^A[15:0],DQS,^CK,#$

This is 4 pin matches separated by commas

the first one is

^A[15:0]

This means look for pins 

A15..A0 The '^A' means the pin_name must "START_WITH" A

so the BA[2:0] pins will not be displayed

The next one is

DQS and will show any pin that contains DSQ so it finds UDQS and LDQS

The next one is:

^CK 

which will show any pin that STARTS with CK (CK, CKE and CK#)

The last one is 

#$  

the Dollar sign means ENDS_WITH so this will show us any pin that ENDS with a '#'

This finds all the pins that we want to change using the signal_rename rules

6. Now we click on the Pin Rename Rules Tab

7. Here we enter the Rename Rules

We enter:

A12:A12_BC_N,A10:A10_AP,DQS$:DQS_P,CK$:CK_P,#$:_N

This is comma separated list of  MATCH:REPLACE rules

A12:A12_BC_N --This will rename pin A12 to A12_BC_N as it appears in the datasheet (the IBIS model stripped off the _BC_N)

A10:A10_AP     --This will rename pin A10 to A10_AP as it appears in the datasheet...

DQS$:DQS_P    --This will change the DQS in any pin  ending in DQS with DQS_P (it will change UDQS to UDQS_P and LDQS to LDQS_P) 

CK$:CK_P          --This will change the CK in any pin ending in CK to CK_P (it will only change CK to CK_P)

#$:_N                --This will change  the # in any pin ENDING_WITH '#" to '_N' 

                               (it will change CK#,LDQS#,UDQS#,CAS#,RAS#,CS#,RST# to CK_N,LDQS_N,....RST_N)

Be careful here, it is easy to miss the ':' between the MATCH:REPLACE and type a comma instead (which I did several times creating this tutorial!)

Another way to accomplish the same thing...

We can put these MATCH:REPLACE rules in a file called rename_rules.txt and then enter rename_rules.txt into the SIG_RENAME_RULES Entry

Instead of separating the rules by commas, we can put each one on its own line

the tricky one is the #$:_N rule because by default partBuilder will ignore lines starting with '#' when reading from a file.

To work around this, in the rename_rules file we must escape the '#' with a backslash like this

\#$:_N

8. Re-Read the Pin Report (which will apply rename rules)

we click the Read Pin Report button which will re-read the pin report and apply our sig-rename rules

9. We examine what the rename rules did for us

Now the ORIG_NAME column is populated for any pin we changed

we can see that the new 

A12_BC_N was A12

A10_AP was A10

UDQS_N was UDQS#

UDQS_P was UDQS

LDQS_P was LDQS

LDQS_N was LDQS#

CK_P was CK

CK_N was CK#

The CS#,RAS#,CAS#,RST# and WE# pins dissappeared from the display becuase the pinMatch no ends with the '#' character

Another benefit of our name changes...The DIFF_PAIR_MATE column is now populated since 

LDQS_P and LDQS_N are mates

UDQS_P and UDQS_N are mates

and 

CK_P and CK_N are mates

We will see that this will make our job of placing pins eaiser since we only have to place the '_P' member of the diff_pair